hey guys, we have 24 cal., 25 cal, 26 cal, 27 cal, 28 cal, and now 29 CALIBER. Im trying the ultra short action and calling it the 290 USA. Running 198 grainers at 2900 FPS. It shoots bug holes at 100 yards and 4" groups at a grand. I figure the BC on the 198s set .660 or better. i've fired...